What is an element found in Earth's core

Primarily iron-nickel alloys in both solid and liquid forms.

Explanation:

Unlike the mineral-rich crust and mantle, the core is made almost entirely of metal—specifically, iron and nickel. The shorthand used for the core's iron-nickel alloys is simply the elements' chemical symbols—NiFe. Elements that dissolve in iron, called siderophiles, are also found in the core.

i think it is dna, i'm not totally sure but i think it might be.